/* 全局样式 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(148,163,184,0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148,163,184,0.4); }

.gradient-text {
  background: linear-gradient(135deg, #22d3ee, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.08);
}

.glass-hover:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
}

.glow-line {
  position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(135deg, #22d3ee, #a855f7);
  opacity: 0; transition: opacity 0.3s;
}
.glass-hover:hover .glow-line { opacity: 1; }

/* 聊天气泡 */
.msg-user {
  background: linear-gradient(135deg, rgba(34,211,238,0.1), rgba(168,85,247,0.1));
  border: 1px solid rgba(34,211,238,0.15);
}

.msg-ai {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}

.msg-ai p { margin-bottom: 0.5em; }
.msg-ai h2, .msg-ai h3, .msg-ai h4 { font-weight: 700; margin: 1em 0 0.4em; }
.msg-ai h2 { font-size: 1.2em; }
.msg-ai h3 { font-size: 1.1em; }
.msg-ai h4 { font-size: 1em; }
.msg-ai ul, .msg-ai ol { padding-left: 1.5em; margin: 0.5em 0; }
.msg-ai li { margin: 0.2em 0; }
.msg-ai strong { color: #22d3ee; }
.msg-ai code { background: rgba(0,0,0,0.3); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.msg-ai pre { background: rgba(0,0,0,0.3); padding: 12px; border-radius: 8px; overflow-x: auto; margin: 0.5em 0; }

/* 打字动画 */
.typing-dot {
  display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: #22d3ee;
  animation: typing 1.4s infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%,100%{opacity:0.3} 50%{opacity:1} }

/* 上传区域 */
.upload-zone {
  border: 2px dashed rgba(148,163,184,0.2);
  transition: all 0.3s;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: rgba(34,211,238,0.5);
  background: rgba(34,211,238,0.03);
}

/* 动画 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeIn 0.3s ease-out; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-slide-up { animation: slideUp 0.4s ease-out; }

/* 背景光球 */
.bg-orb {
  position: fixed; border-radius: 50%; filter: blur(120px); pointer-events: none; z-index: 0;
}

/* 移动端底部安全区域 (iPhone等) */
.safe-area-bottom {
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* 移动端弹窗适配 */
@media (max-width: 640px) {
  .glass { backdrop-filter: blur(8px); }
  /* 表格横向滚动 */
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

/* ============================================================
   .md-body — 统一答案/文档处理结果的 markdown 渲染样式（深色主题）
   配合 markdown.js（marked + DOMPurify + mermaid + KaTeX）
   ============================================================ */
.md-body { line-height: 1.7; word-break: break-word; }
.md-body > :first-child { margin-top: 0; }
.md-body > :last-child { margin-bottom: 0; }
.md-body p { margin: 0.5em 0; }
.md-body h1, .md-body h2, .md-body h3, .md-body h4, .md-body h5, .md-body h6 { font-weight: 700; margin: 1em 0 0.4em; line-height: 1.3; color: #e2e8f0; }
.md-body h1 { font-size: 1.35em; }
.md-body h2 { font-size: 1.2em; }
.md-body h3 { font-size: 1.1em; }
.md-body h4 { font-size: 1em; }
.md-body ul, .md-body ol { padding-left: 1.5em; margin: 0.5em 0; }
.md-body ul { list-style: disc; }
.md-body ol { list-style: decimal; }
.md-body li { margin: 0.25em 0; }
.md-body li > ul, .md-body li > ol { margin: 0.25em 0; }
.md-body strong { color: #22d3ee; font-weight: 700; }
.md-body em { font-style: italic; }
.md-body a { color: #38bdf8; text-decoration: underline; text-underline-offset: 2px; }
.md-body a:hover { color: #7dd3fc; }
.md-body hr { border: 0; border-top: 1px solid rgba(255,255,255,0.12); margin: 1em 0; }

/* 行内代码 / 代码块 */
.md-body code { background: rgba(0,0,0,0.35); padding: 2px 6px; border-radius: 4px; font-size: 0.88em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.md-body pre { background: rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.08); padding: 12px 14px; border-radius: 8px; overflow-x: auto; margin: 0.75em 0; }
.md-body pre code { background: none; padding: 0; font-size: 0.85em; line-height: 1.5; color: #e5e7eb; }

/* 引用块 */
.md-body blockquote { border-left: 3px solid #22d3ee; margin: 0.75em 0; padding: 0.25em 0 0.25em 1em; color: #94a3b8; background: rgba(255,255,255,0.02); border-radius: 0 6px 6px 0; }

/* 表格（GFM）：横向滚动 + 深色边框 + 表头底色 + 斑马纹 */
.md-body table { border-collapse: collapse; width: auto; max-width: 100%; margin: 0.75em 0; font-size: 0.9em; display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.md-body thead th { background: rgba(34,211,238,0.12); color: #e2e8f0; font-weight: 600; }
.md-body th, .md-body td { border: 1px solid rgba(255,255,255,0.12); padding: 7px 12px; text-align: left; vertical-align: top; }
.md-body tbody tr:nth-child(even) { background: rgba(255,255,255,0.025); }
.md-body tbody tr:hover { background: rgba(34,211,238,0.06); }

/* mermaid 绘图块 */
.md-body .mermaid { margin: 0.75em 0; text-align: center; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 8px; padding: 12px; overflow-x: auto; }
.md-body .mermaid svg { max-width: 100%; height: auto; }

/* KaTeX 显示公式横向可滚动，避免溢出 */
.md-body .katex-display { overflow-x: auto; overflow-y: hidden; padding: 2px 0; }

/* mermaid 渲染失败时的回退：保留原始代码块并加提示 */
.md-body pre.mermaid-failed { border-color: rgba(251,191,36,0.4); }
.md-body pre.mermaid-failed::before { content: "⚠ 图表语法有误，以下为 mermaid 源码："; display: block; color: #fbbf24; font-size: 0.78em; margin-bottom: 6px; }